php大作业：普通用户浏览界面+购物车界面（为方便队友重组代码）

1、代码部分说明

putongmain.php(普通用户浏览商品主界面)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>商品界面</title>
    <style type="text/css">
        html{font-size:12px;}
        fieldset{width:850px; margin: 0 auto;}
        legend{font-weight:bold; font-size:14px;}
        label{float:left; 70px; margin-left:10px;}
        .left{margin-left:80px;}
        .input{150px;}
        .sousu{margin-left:210px; 300px}
        .sousubutton{margin-left:20px;}
    </style>
</head>
<body>
<fieldset>
        <legend><font color="blue">商品浏览</font></legend>
        <form  method="post" action="save.php">
        <p>
            <input id="sousu" name="bname" type="text"  class="sousu" />
            <input type="submit" name="sousubutton" value="搜索"  class="sousubutton">
            <a href="gouwuche.php" target="_self" class="sousubutton">查看购物车</a>
        </p>
        </form>

        <table border="0px"cellspacing="20px" cellpadding="5px">
            <?php
            $conn = mysqli_connect("localhost", "root", "123", "db") or die("连接数据库服务器失败！".mysqli_error()); //连接MySQL服务器，选择数据库
            mysqli_query($conn,"set names utf8");                        //设置数据库编码格式utf8
            mysqli_select_db($conn,'db'); //选择数据库
            $q = "select * from bookinfo"; //SQL查询语句
            $rs=mysqli_query($conn,$q);
            //$rs = mysqli_query($q, $link); //获取数据集
            while($row = mysqli_fetch_row($rs)){
                echo "<tr><td><img src='$row[3]'/></td><td>$row[1]</td><td>$row[2]元</td><td>$row[4]</td><td><a href='gouwuchuli.php?bid={$row[0]}'>加入购物车</a></td></tr>"; //显示数据
            }
            ?>
        </table>
    </fieldset>
</body>
</html>

save.php

<?php
/**
 * Created by PhpStorm.
 * User: 米羊
 * Date: 2020/5/28
 * Time: 20:26
 */
$bname=$_POST['bname'];
header("location:sousu.php?bname=$bname ");

sousu.php

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>商品界面</title>
    <style type="text/css">
        html{font-size:12px;}
        fieldset{width:850px; margin: 0 auto;}
        legend{font-weight:bold; font-size:14px;}
        label{float:left; 70px; margin-left:10px;}
        .left{margin-left:80px;}
        .input{150px;}
        .sousu{margin-left:210px; 300px}
        .sousubutton{margin-left:20px;}
    </style>
</head>
<body>
<?php
$bname=$_GET['bname'];
?>
<fieldset>
    <legend><font color="blue">商品搜索</font></legend>
    <p>
        <input id="sousu" name="sousu" type="text"  class="sousu"  value="<?php echo $bname ?>"/>
        <input type="submit" name="sousubutton" value="搜索"  class="sousubutton">
        <a href="gouwuche.php" target="_self" class="sousubutton">查看购物车</a>
    <p/>
<table border="0px"cellspacing="20px" cellpadding="5px">
    <?php
    $bname=$_GET['bname'];
    $conn = mysqli_connect("localhost", "root", "123", "db") or die("连接数据库服务器失败！".mysqli_error()); //连接MySQL服务器，选择数据库
    mysqli_query($conn,"set names utf8");                        //设置数据库编码格式utf8
    mysqli_select_db($conn,'db'); //选择数据库
    $q = "select * from bookinfo where bname like '%{$bname}%'"; //SQL查询语句
    $rs=mysqli_query($conn,$q);
    //$rs = mysqli_query($q, $link); //获取数据集
    $row = mysqli_fetch_array($rs);
    echo "<tr><td><img src='$row[3]'/></td><td>$row[1]</td><td>$row[2]</td><td>$row[4]</td><td><a href='gouwuchuli.php?ids={$row[1]}'>加入购物车</a></td></tr>"; //显示数据
    ?>
</table>
</fieldset>
</body>
</html>

gouwuchuli.php(用户在浏览商品界面点击加入购物车后进行处理的代码)

<?php
/**
 * Created by PhpStorm.
 * User: 米羊
 * Date: 2020/5/30
 * Time: 10:11
 */
$bid=$_GET['bid'];
$conn = mysqli_connect("localhost", "root", "123", "db") or die("连接数据库服务器失败！".mysqli_error()); //连接MySQL服务器，选择数据库
mysqli_query($conn,"set names utf8");                        //设置数据库编码格式utf8
mysqli_select_db($conn,'db'); //选择数据库
$q = "select * from gouwuche where bid='$bid'"; //SQL查询语句
$rows=mysqli_query($conn,$q);
if (mysqli_num_rows($rows) < 1){
   $sql="select * from bookinfo where bid='$bid'";
    $rs=mysqli_query($conn,$sql);
    $arr = mysqli_fetch_array($rs);
    $bid=$arr[0];
    $bname=$arr[1];
    $prince=$arr[2];
    $image=$arr[3];
    $num=1;
    $sql1="insert into gouwuche(bid,bname,prince,image,num) values('$bid','$bname',$prince,'$image',$num)";
    $rs1=mysqli_query($conn,$sql1)or die("插入失败".$sql1);
}else{
    $arr1 = mysqli_fetch_array($rows);
    $bid=$arr1[0];
    $num=$arr1[4];
    $num=$num+1;
    $sql2="update gouwuche set num='$num' where bid='$bid'";
    $rs2=mysqli_query($conn,$sql2)or die("修改失败".$sql2);
}
header("location:putongmain.php");

gouwuche.php(用来展示购物车)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>购物车界面</title>
    <style type="text/css">
        html{font-size:12px;}
        fieldset{width:900px; margin: 0 auto;}
        legend{font-weight:bold; font-size:14px;}
        label{float:left; 70px; margin-left:10px;}
        .left{
            margin-left:180px;
            font-size:14px
        }
        .input{150px;}
        .dingdan{margin-left:410px;}
        .fanhui{margin-left:50px;}
    </style>
</head>
<body>
<?php
$sum=0;
$numsum=0;
$conn = mysqli_connect("localhost", "root", "123", "db") or die("连接数据库服务器失败！".mysqli_error()); //连接MySQL服务器，选择数据库
mysqli_query($conn,"set names utf8");                        //设置数据库编码格式utf8
mysqli_select_db($conn,'db'); //选择数据库
$q1 = "select * from gouwuche"; //SQL查询语句
$rs1=mysqli_query($conn,$q1);
//$rs = mysqli_query($q, $link); //获取数据集
while($row1 = mysqli_fetch_row($rs1)){
    $prince=$row1[2];
    $num=$row1[4];
    $numsum=$numsum+$num;
    $sum=$sum+$num*$prince;
}
?>
<fieldset>
    <legend><font color="blue">购物车</font></legend>
        <p>
            <a href="putongmain.php" target="_self" class="fanhui">返回</a>
            <a href="adddingdan.php" target="_self" class="dingdan">提交订单</a>
        </p>
    <p class="left"><font color="blue">购物车中共有<?php echo $numsum  ?>件商品，总价<?php echo $sum  ?>元</font></p>
    <table border="0px"cellspacing="20px" cellpadding="5px">
        <tr>
            <th>书图片</th>
            <th>书名</th>
            <th>价格</th>
            <th>已购买数量</th>
            <th>购买</th>
            <th>取消购买</th>
        </tr>
        <?php
        $conn = mysqli_connect("localhost", "root", "123", "db") or die("连接数据库服务器失败！".mysqli_error()); //连接MySQL服务器，选择数据库
        mysqli_query($conn,"set names utf8");                        //设置数据库编码格式utf8
        mysqli_select_db($conn,'db'); //选择数据库
        $q = "select * from gouwuche"; //SQL查询语句
        $rs=mysqli_query($conn,$q);
        //$rs = mysqli_query($q, $link); //获取数据集
        while($row = mysqli_fetch_row($rs)){
            echo "<tr><td><img src='$row[3]'/></td><td>$row[1]</td><td>$row[2]元</td><td>$row[4]</td><td><a href='gouwuchuli1.php?bid={$row[0]}'>加入购物车</a></td><td><a href='quxiao.php?bid={$row[0]}'>取消购买</a></td></tr>"; //显示数据
        }
        ?>
    </table>
</fieldset>
</body>
</html>

gouwuchuli1.php（用户在购物车界面点击加入购物车后进行处理的代码）

<?php
/**
 * Created by PhpStorm.
 * User: 米羊
 * Date: 2020/5/30
 * Time: 10:11
 */
$bid=$_GET['bid'];
$conn = mysqli_connect("localhost", "root", "123", "db") or die("连接数据库服务器失败！".mysqli_error()); //连接MySQL服务器，选择数据库
mysqli_query($conn,"set names utf8");                        //设置数据库编码格式utf8
mysqli_select_db($conn,'db'); //选择数据库
$q = "select * from gouwuche where bid='$bid'"; //SQL查询语句
$rows=mysqli_query($conn,$q);
if (mysqli_num_rows($rows) < 1){
    $sql="select * from bookinfo where bid='$bid'";
    $rs=mysqli_query($conn,$sql);
    $arr = mysqli_fetch_array($rs);
    $bid=$arr[0];
    $bname=$arr[1];
    $prince=$arr[2];
    $image=$arr[3];
    $num=1;
    $sql1="insert into gouwuche(bid,bname,prince,image,num) values('$bid','$bname',$prince,'$image',$num)";
    $rs1=mysqli_query($conn,$sql1)or die("插入失败".$sql1);
}else{
    $arr1 = mysqli_fetch_array($rows);
    $bid=$arr1[0];
    $num=$arr1[4];
    $num=$num+1;
    $sql2="update gouwuche set num='$num' where bid='$bid'";
    $rs2=mysqli_query($conn,$sql2)or die("修改失败".$sql2);
}
header("location:gouwuche.php");

quxiao.php(用户在购物车界面点击取消购买后进行处理的代码)

<?php
/**
 * Created by PhpStorm.
 * User: 米羊
 * Date: 2020/5/30
 * Time: 11:14
 */
$bid=$_GET['bid'];
$conn = mysqli_connect("localhost", "root", "123", "db") or die("连接数据库服务器失败！".mysqli_error()); //连接MySQL服务器，选择数据库
mysqli_query($conn,"set names utf8");                        //设置数据库编码格式utf8
mysqli_select_db($conn,'db'); //选择数据库
$q = "select * from gouwuche where bid='$bid'"; //SQL查询语句
$rs=mysqli_query($conn,$q);
$arr = mysqli_fetch_array($rs);
$num=$arr[4];
if($num>1){
    $num=$num-1;
    $sql1="update gouwuche set num='$num' where bid='$bid'";
    $rs1=mysqli_query($conn,$sql1)or die("修改失败".$sql1);
}else{
    $sql2="delete from gouwuche where bid='$bid'";
    $rs2=mysqli_query($conn,$sql2)or die("删除失败".$sql2);
}
header("location:gouwuche.php");

image文件下放置的是书的图片

2、数据库和表展示

bookinfo表展示

gouwuche表展示

数据库名db,数据表名bookinfo

sql文件已经发到宿舍群里了

3、实现效果图

输如参数，点击搜索

点击加入购物车

在购物车界面，点击加入购物车，数量加1，取消购买，数量减1，若数量为0，则不显示此商品。

相关阅读:
什么是浮动IP
How can I detect multiple logins into a Django web application from different locations?
git add -A使用说明
 理解水平扩展和垂直扩展
 php != 和 !== 的区别
 wireshark:Couldn't run /usr/bin/dumpcap in child process: Permission denied
Unable to VNC onto Centos server remotely
systemctl使用说明
 KiB、MiB与KB、MB的区别
 python带setup.py的包的安装
原文地址：https://www.cnblogs.com/yang2000/p/12983463.html